As the truth about Li Jing's sacrifice and the depth of his love for Ne Zha came to light, Ne Zha's heart was filled with a mix of emotions - shock, gratitude, and a new - found determination. He realized that he couldn't let his father down, and he had to face the approaching Heavenly Tribulation with courage.

At the same time, Ao Bing, who had been wavering in his loyalty to the Dragon Clan, finally made a decision. He couldn't stand by and watch Ne Zha face the thunder alone. Despite the consequences he might face from his own clan, he decided to stand beside his friend.

The day of the Heavenly Tribulation arrived. Dark clouds gathered thickly above Chentangguan, and the air was filled with a sense of impending doom. The townspeople, filled with fear, huddled in their homes, waiting for the inevitable.

Ne Zha, wearing his red armbands and carrying his fire - tipped spear, stood in the center of the town, ready to face the thunder. Beside him was Ao Bing, his ice - blue robes fluttering in the wind, his eyes filled with resolve.

Taiyi, with a heavy heart, watched from the sidelines. He knew that the power of the Heavenly Tribulation was almost invincible, but he also had faith in Ne Zha and Ao Bing. "Ne Zha, Ao Bing, be careful. The power of the thunder is beyond imagination. But remember, you two are not alone. I'll do my best to help you," he said, his voice filled with concern.

Ne Zha turned to Taiyi and smiled. "Master, don't worry. I'm not afraid. I'll face it head - on," he said, his voice firm.

As the first bolt of lightning struck the ground, Ne Zha and Ao Bing immediately launched their attacks. Ne Zha unleashed a powerful blast of fire - magic, while Ao Bing summoned a wall of ice to deflect the thunder's power.

The thunder was relentless. Wave after wave of lightning crashed down, each strike more powerful than the last. But Ne Zha and Ao Bing fought bravely. Their magic powers intertwined in the air, creating a dazzling display of light and energy.

Despite their efforts, the power of the Heavenly Tribulation was too great. Ne Zha and Ao Bing were gradually pushed to the brink of exhaustion. Their bodies were battered and bruised, and their magic powers were fading.

Just when it seemed all was lost, Ne Zha remembered the words his father had said to him. "Your fate is determined by yourself, not by the heavens." These words gave him a new burst of strength. He looked at Ao Bing and said, "Ao Bing, we can't give up. Let's fight together until the end!"

Ao Bing nodded, his eyes filled with determination. "Yes, Ne Zha. We'll face it together," he said.

With a final burst of energy, Ne Zha and Ao Bing combined their powers. Ne Zha's fire - magic and Ao Bing's ice - magic merged into a powerful force that surged towards the sky, directly facing the Heavenly Tribulation.

The clash between their combined power and the thunder was earth - shattering. The entire town of Chentangguan trembled, and the onlookers held their breath in fear. But Ne Zha and Ao Bing did not flinch. They stood their ground, fighting with all their might.

In the end, although their physical bodies were destroyed by the power of the thunder, their spirits remained unbroken. Their combined efforts managed to weaken the Heavenly Tribulation, and the people of Chentangguan were saved.

After the battle, the Celestial Venerable Yuanshi, who had been watching from the celestial realm, was deeply moved by the courage and friendship of Ne Zha and Ao Bing. He decided to spare their souls, allowing them to be reincarnated in the future.

And so, the story of Ne Zha and Ao Bing's heroic battle against the Heavenly Tribulation became a legend in Chentangguan. Their friendship and courage inspired generations to come, teaching them that true strength lies not in one's birth or destiny, but in the power of the heart and the courage to face one's challenges.